the more I look at it the more I know it's light starvation. See how tall the plant is and how there are several inches of stalk between branches? That's called stretch and stretch is caused when too little light reaches the plant. Also see how your plant is about to fall over? Also, caused by not enough light. The plant is growing tall in an effort to reach the light...so bring the lights closer and bring more of them.

Most people that use CFL's like that tend to use them in clusters of at least 3 per plant.

Home Depot carries a pretty inexpensive line of large wattage CFL's in their flood light section. They put out 100 watts of CFL light all in one bulb. Cost about 20 bucks for the bulbs, never did see the ballast but it cant be much more then 20 or 30 bucks too. Perfect for what your doing here. One fat 100 watt bulb dropped down vertically between your plants aught to work just fine for the 1 or 2 plants your have there.